1. Augustine. The Trinity. Edited by John E. Rotelle. Translated by Edmund Hill. The Works of Saint Augustine: A Translation for the 21st Century. Hyde Park, NY: New City Press, 1991.
2. Barth, Karl. Evangelical Theology: An Introduction. Translated by Grover Foley. New York: Holt, Rinehart, and Winston, 1963.
3. Bruce, Matthew J. Aragon. “Schleiermacher and Barth: On Theology as the Science of the Divine Word.” In Karl Barth in Conversation, edited by W. Travis McMaken and David Congdon, 26‒38. Eugene, OR: Pickwick Publications, 2014.
4. Burke, Thomas J. “Is Metaphysics a Science?” Socio-Historical Examination of Religion and Ministry 1, no. 2 (Fall 2019): 252‒73. https://doi.org/10.33929/sherm.2019.vol1.no2.08.
5. Clark, David K. To Know and Love God: Method for Theology. 2003. Foundations of Evangelical Theology. Reprint, Wheaton, IL: Crossway, 2010.